He have untrained ears. You need to show him some serious gear to listen to.

I attempted to show him the light by getting him to listen to both my DT-990s and my HD800s, but still he insists on the buds. Apparently the full-size cans are "too inconvenient" and the IE8s are uncomfortable.

Oh well, at least I tried.. and it's probably healthier for his wallet this way

You know you're an audiophile when it's 1.55am and you are not sleeping because as soon as the song finishes and the next one starts, you want to listen to it until the end..

Technically this is off topic, but you know my dad is NOT an audiophile when he prefers stock Apple buds to Sennheiser IE8s. Seriously... :|

Sounds like my dad. Years of going to concerts and rocking really do a number on your hearing. First thing he does when he tries out one of my new headphones is turn the volume up all the way. I think at that point you should still be able to appreciate soundstage and separation as well as overall soundsig though so there may be hope yet